The ruling on one who enters the state of ihram for 'Umrah on behalf of his young son but does not complete it

Question:
Honorable Shaykh, may Allah grant you success. A man wanted to perform 'Umrah, and when he reached the miqat, he intended to perform 'Umrah. He also intended to perform 'Umrah on behalf of his young son, who was with him as well. He completed his own 'Umrah in full, but he did not complete the 'Umrah on behalf of his son, as he left him in the apartment. Does he owe anything?

Answer:
That is, he entered the state of ihram for himself and intended to enter the state of ihram on behalf of the young boy. It is not that he intended the 'Umrah; he intended the ihram on behalf of the young boy. If the young boy is of the age of discernment, he is the one who intends it for himself. But if he is a young boy below the age of discernment, he intends the ihram on his behalf, keeps him away from the prohibitions of ihram, makes him perform the tawaf (circumambulation of the Ka'bah), makes him perform the sa'y (walking between al-Safa and al-Marwah), and shortens the hair from his head, which are the acts of 'Umrah. Yes.